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公开(公告)号：US3421149A
公开(公告)日：1969-01-07
申请号：US3421149D
申请日：1966-04-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： KRETZMER ERNEST R , MECKLENBURG PAUL , RICE DONALD W , RYAN WILLIAM
CPC classification number: G11C19/10
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